01baf1d8b42b779575cc89dd4600d488a1b70d4957329f47f97e9cee2b12d430

Analysis

max time kernel
149s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2023, 00:22

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General

Target

218c7421b6efda2d6fd250180c5b43b8.exe
Size

153KB
MD5

218c7421b6efda2d6fd250180c5b43b8
SHA1

094a3f9d1b4c3710c7ec5175f98fab8cc58c2ba1
SHA256

01baf1d8b42b779575cc89dd4600d488a1b70d4957329f47f97e9cee2b12d430
SHA512

37f7980165273c74f87c7e0d93b0dc215f76f338801d6963a7fec106ca3551d5f279cd5d1f16cdced57218610b050f58a54af8f01ada64602ebba11b862db446
SSDEEP

1536:p8nXOBSKn1kfZ0I58RVun1AZj7wPnNOJLMEJFtiL0wkej2qRyK6iiyHOLA59TA5g:fBnsZ0I58RVY1AgeXJA0Y2TthLA590u

Score

7^/10

adware stealer

Malware Config

Signatures

Loads dropped DLL 1 IoCs

pid	Process
4744	rundll32.exe

Installs/modifies Browser Helper Object 2 TTPs 3 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{0ccf3a51-415c-4f2f-beab-65f09b80441f}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{0ccf3a51-415c-4f2f-beab-65f09b80441f}\ = "3520000"	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\tuvVMfdd.dll	218c7421b6efda2d6fd250180c5b43b8.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000_Classes\WOW6432Node\CLSID	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0ccf3a51-415c-4f2f-beab-65f09b80441f}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0ccf3a51-415c-4f2f-beab-65f09b80441f}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0ccf3a51-415c-4f2f-beab-65f09b80441f}\InprocServer32\ = "C:\\Windows\\SysWow64\\tuvVMfdd.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{0ccf3a51-415c-4f2f-beab-65f09b80441f}\InprocServer32\ThreadingModel = "free"	rundll32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4904 wrote to memory of 4744	4904	218c7421b6efda2d6fd250180c5b43b8.exe	16
PID 4904 wrote to memory of 4744	4904	218c7421b6efda2d6fd250180c5b43b8.exe	16
PID 4904 wrote to memory of 4744	4904	218c7421b6efda2d6fd250180c5b43b8.exe	16

C:\Users\Admin\AppData\Local\Temp\218c7421b6efda2d6fd250180c5b43b8.exe
"C:\Users\Admin\AppData\Local\Temp\218c7421b6efda2d6fd250180c5b43b8.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:4904
- C:\Windows\SysWOW64\rundll32.exe
  rundll32 "C:\Windows\system32\tuvVMfdd.dll",a
  2⤵
  - Loads dropped DLL
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:4744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

T1176

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Windows 7 deprecation

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